“Every girl wants a big, beautiful wedding,” says Cyrus, 22. “And at the end of the day, I’ll do whatever she wants.”

The self-proclaimed homebody tends to shy away from the Hollywood scene, opting instead for quiet nights with Song at the home they share with their four dogs.

“It’s just been good to enjoy someone else’s company and not worry about a million different things,” he says. “I’m happier than I’ve ever been.”

No Wedding Date – Yet

For now, though, the couple is in no hurry to wed.

According to Cyrus, who is gearing up for his first tour under the moniker Ashland High, they plan to focus on their careers in 2012, with their wedding possiblly as far as a year or two away – or even longer.

“When I asked her [to marry me], I told her, ‘I don’t care if we get married tomorrow, two weeks from now, a year from now or 10 years from now; it doesn’t matter,’ ” says Trace.

Still, he adds: “We feel like we’re almost married right now.”

Cyrus predicts the distance and time apart on the road will be difficult for the couple. “We’re going to miss each other terribly,” he says, “but it’s time for me to really focus on work.”

Even while he s away on tour, a bit of Song will always be with Cyrus. He credits her as the inspiration for his mixtape Geronimo – especially his song “Satellite,” which he says they listen to together often.

“My fiancée inspires me tremendously,” he tells PEOPLE. “Not every song’s written directly about her, but whenever I’m in the studio, I’m constantly thinking about her.”